August 6, 1945
1942. MLM
It started WWII and a start to a deadly war revolution.
hiroshima then three days later a second bomb was dropped on nagasaki
Bombs don't start wars, people do.
There were different bombs for different things. The standard bomb had an outer casing made of steel, filled with an explosive similar to TNT. However, there were incendiary bombs, with an outer skin of thin sheet metal, and filled with a hot burning chemical mix intended to start fires. Other bombs were made to penetrate heavy concrete fortifications, a round bomb made to skip across water and destroy dams, and the atomic bombs used at Hiroshima and Nagasaki.
The bombing of Hiroshima was only one bomb. It was the atomic bomb called little boy.
· Hiroshima · Holocaust
Although over years could be argued, I would say 1945 as it had one of the largest global and lasting impacts and events. 1942 was the turrning point of WW2 which finally ends at the end of the year (death toll of which is millions), Allied discovery of the holocaust death camps, dropping of nuclear bombs in Nagasaki and Hiroshima (which also led to the start of the cold war between America and Russia) and the United Nations is formed.
You broke it.
The atomic bomb was dropped over Hiroshima on august 6 1945. This was in world war 2.
Around 1916, before that they had no real bombs.